仿生导叶对CAP1400主泵性能影响研究

Study on the Influence of Bionic Guide Vane on the Performance of CAP1400 Main Pump

为探究仿生导叶对主泵整体性能的影响,本文以CAP1400主泵的缩尺模型(1:2.5)为研究对象,提出了一种新型导叶叶片仿生设计结构,并通过优化设计平台得到了优化模型(仿生导叶最优解)。采用数值方法得到了主泵全三维模型的水力性能和安全性能,并通过对比分析原模型与优化模型之间性能差异,得到结论:在设计工况下,优化模型使主泵的扬程和效率分别提高了1.7%和1.9%;优化模型具有降低内流场噪声和改善导叶叶片表面应力分布的作用;优化模型对主泵空化性能影响不大。本研究结果可为后续主泵进行水力设计和声学预测提供参考。

In order to explore the influence of bionic guide vane on the overall performance of the main pump,a new bionic structural design of guide vane is proposed in this paper by taking the scale model(1:2.5)of CAP1400 main pump as the study object,and an optimized model(the optimal solution of the bionic guide vane)is obtained by optimizing the design platform.By using the numerical method,the hydraulic performance and safety performance of the full threedimensional model of the main pump are obtained.By comparing and analyzing the performance difference between the original model and optimized model,the following conclusions are drawn:under the design condition,the optimized model can improve the head and efficiency of the main pump by 1.7%and 1.9%respectively;the optimized model can reduce the internal flow field noise and improve the stress distribution on the guide vane surface;the optimized model has little effect on the cavitation performance of the main pump.This paper can provide a reference for the subsequent hydraulic design and acoustic prediction of main pump.